Basic earnings per common share are computed by dividing income allocated to common stockholders by the weighted-average number of common shares outstanding during each period. The computation of diluted earnings per common share considers the number of shares issuable upon the assumed exercise of outstanding common stock options. Antidilutive common shares are not included in the calculation of diluted earnings per common share. For the years ended December 31, 2019, 2018 and 2017, shares deemed to be antidilutive, and thus excluded from the computation of earnings per common share were 183,000, 160,000 and 9,000, respectively.

The table below shows earnings per common share and diluted earnings per common share, and reconciles the numerator and denominator of both earnings per common share calculations.


	Year Ended December 31,
	2019		2018		2017
	(In thousands, except per share amounts)
Earnings per common share:
Net earnings	$	207,827	$	152,003	$	104,411
Less: Net earnings allocated to restricted stock		488		429		382

Net earnings allocated to common shareholders	$	207,339	$	151,574	$	104,029


Weighted average shares outstanding		139,757		121,670		109,409

Basic earnings per common share	$	1.48	$	1.25	$	0.95


Diluted earnings per common share:
Net income allocated to common shareholders	$	207,339	$	151,574	$	104,029


Weighted average shares outstanding		139,757		121,670		109,409
Incremental shares from assumed exercise of outstanding options		177		287		398

Diluted weighted average shares outstanding		139,934		121,957		109,807
Diluted earnings per common share	$	1.48	$	1.24	$	0.95